HP 397415-S21 COMP 8GB DDR2-667MHZ ECC 1.8V DR FBDIMMAddOn FACTORY ORIGINAL 8GB (2x4GB) DDR2 667MHZ DR DIMM F HP For Server 8 GB (2 x 4GB) DDR2 667 DDR2 SDRAM 667 MHz Dual rank Memory CL5 1. 80 V ECC Fully Buffered 240 pin DIMM Lifetime Warranty VPN: 397415 S21 AM SKU: RSC127379 UPC: 821455232620 8 GB bar will run multiple applications together and enhance your computer's performance 667 MHz speed with Fully Buffered signal and CL5 latency to execute routine softwares at a steady pace 240 pin pin DDR2